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/Unittests/googletest/samples/sample9_unittest.cc

http://unladen-swallow.googlecode.com/
C++ | 160 lines | 83 code | 23 blank | 54 comment | 10 complexity | afd5d2c57534cf441d62e8dcc389bc11 MD5 | raw file
  1// Copyright 2009 Google Inc. All Rights Reserved.
  2//
  3// Redistribution and use in source and binary forms, with or without
  4// modification, are permitted provided that the following conditions are
  5// met:
  6//
  7//     * Redistributions of source code must retain the above copyright
  8// notice, this list of conditions and the following disclaimer.
  9//     * Redistributions in binary form must reproduce the above
 10// copyright notice, this list of conditions and the following disclaimer
 11// in the documentation and/or other materials provided with the
 12// distribution.
 13//     * Neither the name of Google Inc. nor the names of its
 14// contributors may be used to endorse or promote products derived from
 15// this software without specific prior written permission.
 16//
 17// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 18// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 19// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 20// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 21// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 22// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 23// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 24// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 25// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 26// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 27// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 28//
 29// Author: vladl@google.com (Vlad Losev)
 30
 31// This sample shows how to use Google Test listener API to implement
 32// an alternative console output and how to use the UnitTest reflection API
 33// to enumerate test cases and tests and to inspect their results.
 34
 35#include <stdio.h>
 36
 37#include <gtest/gtest.h>
 38
 39using ::testing::EmptyTestEventListener;
 40using ::testing::InitGoogleTest;
 41using ::testing::Test;
 42using ::testing::TestCase;
 43using ::testing::TestEventListeners;
 44using ::testing::TestInfo;
 45using ::testing::TestPartResult;
 46using ::testing::UnitTest;
 47
 48namespace {
 49
 50// Provides alternative output mode which produces minimal amount of
 51// information about tests.
 52class TersePrinter : public EmptyTestEventListener {
 53 private:
 54  // Called before any test activity starts.
 55  virtual void OnTestProgramStart(const UnitTest& unit_test) {}
 56
 57  // Called after all test activities have ended.
 58  virtual void OnTestProgramEnd(const UnitTest& unit_test) {
 59    fprintf(stdout, "TEST %s\n", unit_test.Passed() ? "PASSED" : "FAILED");
 60    fflush(stdout);
 61  }
 62
 63  // Called before a test starts.
 64  virtual void OnTestStart(const TestInfo& test_info) {
 65    fprintf(stdout,
 66            "*** Test %s.%s starting.\n",
 67            test_info.test_case_name(),
 68            test_info.name());
 69    fflush(stdout);
 70  }
 71
 72  // Called after a failed assertion or a SUCCESS().
 73  virtual void OnTestPartResult(const TestPartResult& test_part_result) {
 74    fprintf(stdout,
 75            "%s in %s:%d\n%s\n",
 76            test_part_result.failed() ? "*** Failure" : "Success",
 77            test_part_result.file_name(),
 78            test_part_result.line_number(),
 79            test_part_result.summary());
 80    fflush(stdout);
 81  }
 82
 83  // Called after a test ends.
 84  virtual void OnTestEnd(const TestInfo& test_info) {
 85    fprintf(stdout,
 86            "*** Test %s.%s ending.\n",
 87            test_info.test_case_name(),
 88            test_info.name());
 89    fflush(stdout);
 90  }
 91};  // class TersePrinter
 92
 93TEST(CustomOutputTest, PrintsMessage) {
 94  printf("Printing something from the test body...\n");
 95}
 96
 97TEST(CustomOutputTest, Succeeds) {
 98  SUCCEED() << "SUCCEED() has been invoked from here";
 99}
100
101TEST(CustomOutputTest, Fails) {
102  EXPECT_EQ(1, 2)
103      << "This test fails in order to demonstrate alternative failure messages";
104}
105
106}  // namespace
107
108int main(int argc, char **argv) {
109  InitGoogleTest(&argc, argv);
110
111  bool terse_output = false;
112  if (argc > 1 && strcmp(argv[1], "--terse_output") == 0 )
113    terse_output = true;
114  else
115    printf("%s\n", "Run this program with --terse_output to change the way "
116           "it prints its output.");
117
118  UnitTest& unit_test = *UnitTest::GetInstance();
119
120  // If we are given the --terse_output command line flag, suppresses the
121  // standard output and attaches own result printer.
122  if (terse_output) {
123    TestEventListeners& listeners = unit_test.listeners();
124
125    // Removes the default console output listener from the list so it will
126    // not receive events from Google Test and won't print any output. Since
127    // this operation transfers ownership of the listener to the caller we
128    // have to delete it as well.
129    delete listeners.Release(listeners.default_result_printer());
130
131    // Adds the custom output listener to the list. It will now receive
132    // events from Google Test and print the alternative output. We don't
133    // have to worry about deleting it since Google Test assumes ownership
134    // over it after adding it to the list.
135    listeners.Append(new TersePrinter);
136  }
137  int ret_val = RUN_ALL_TESTS();
138
139  // This is an example of using the UnitTest reflection API to inspect test
140  // results. Here we discount failures from the tests we expected to fail.
141  int unexpectedly_failed_tests = 0;
142  for (int i = 0; i < unit_test.total_test_case_count(); ++i) {
143    const TestCase& test_case = *unit_test.GetTestCase(i);
144    for (int j = 0; j < test_case.total_test_count(); ++j) {
145      const TestInfo& test_info = *test_case.GetTestInfo(j);
146      // Counts failed tests that were not meant to fail (those without
147      // 'Fails' in the name).
148      if (test_info.result()->Failed() &&
149          strcmp(test_info.name(), "Fails") != 0) {
150        unexpectedly_failed_tests++;
151      }
152    }
153  }
154
155  // Test that were meant to fail should not affect the test program outcome.
156  if (unexpectedly_failed_tests == 0)
157    ret_val = 0;
158
159  return ret_val;
160}